Granollers and Zeballos will outlast Darderi and Etcheverry in the Cincinnati Open men's doubles quarterfinal on August 21 on Grandstand. The Spanish-Argentine pair will lean on their August 19 Round 2 win over Austin Krajicek and Nikola Mektić, a 6-3, 5-7, 10-4 match tiebreak, to control the tie a…